.avue-back-top{
  position: fixed;
  display: none;
  cursor: pointer;
  &--show{
    display: block;
  }
  &__icon{
    background-color: rgba(0,0,0,.6);
    border-radius: 2px;
    box-shadow: 0 1px 3px rgba(0,0,0,.2);
    transition: all .2s ease-in-out;
    i{
      color: #fff;
      font-size: 24px;
      padding: 8px 12px;
    }
  }
}

.avue-affix{
  position: fixed;
  z-index: 10;
}